Norton 66261126557 Fiber Disc 5 in 36 Grit Zirconia Alumina

Product Description

The NORTON 66261126557 is a 5-inch zirconia alumina fiber disc designed for aggressive material removal on metal, weld seams, and other hard surfaces. Part of the F826P Series, this disc features a very coarse 36-grit abrasive on a resinoid-bonded, fiber-backed construction that delivers fast cutting action and durability under sustained load. The threaded arbor hole accepts a 5/8-11 arbor attachment and is engineered for use with the Norton AVOS Speed-Lok back-up pad system. Rated to 13,000 RPM, it suits high-speed angle grinder applications common in fabrication, maintenance, and repair work. Licensed tradespeople and skilled fabricators working in metal shops, shipyards, and industrial maintenance environments rely on this disc type for surface conditioning and stock removal tasks.

This disc is suited for use on ferrous and non-ferrous metals where aggressive grinding, weld blending, or surface prep is required. The zirconia alumina abrasive self-sharpens during use, maintaining cut rate longer than standard aluminum oxide discs at comparable grit levels. It is appropriate for both flat and contoured surface work when mounted on a compatible rigid or semi-flexible back-up pad. The threaded arbor hole design allows quick disc changes without separate hardware, reducing downtime in production environments.

Key Features

• 5-inch diameter with 5/8-11 threaded arbor hole for secure attachment
• 36-grit zirconia alumina abrasive for very coarse, high-speed stock removal
• Resinoid bond and fiber backing provide durability under heavy grinding loads
• Rated to 13,000 RPM for compatibility with standard angle grinders
• Self-sharpening zirconia alumina grain maintains consistent cut rate
• Compatible with Norton AVOS Speed-Lok back-up pad system for fast disc changes

Compatibility

Designed for use with the Norton AVOS Speed-Lok back-up pad. The 5/8-11 threaded arbor hole attachment type is compatible with standard angle grinder arbors accepting that thread size.

Installation Notes

Install and replace fiber discs with the grinder disconnected from its power source. Inspect the disc for cracks or damage before mounting — do not use a damaged disc. Ensure the back-up pad is rated for at least the disc's maximum RPM of 13,000 before operation. Follow ANSI B7.1 and applicable OSHA standards for abrasive wheel use, including the use of appropriate eye and face protection.